aboutsummaryrefslogtreecommitdiffstats
path: root/mod/zfinger.php
blob: b13af50b7e36ab88733781c5854d1ecd7cb3a81f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
<?php

function zfinger_init(&$a) {

	require_once('include/zot.php');
	require_once('include/crypto.php');

	$ret = array('success' => false);

	$zhash     = ((x($_REQUEST,'guid_hash'))  ? $_REQUEST['guid_hash']  : '');
	$zguid     = ((x($_REQUEST,'guid'))       ? $_REQUEST['guid']       : '');
	$zguid_sig = ((x($_REQUEST,'guid_sig'))   ? $_REQUEST['guid_sig']   : '');
	$zaddr     = ((x($_REQUEST,'address'))    ? $_REQUEST['address']    : '');
	$ztarget   = ((x($_REQUEST,'target'))     ? $_REQUEST['target']     : '');
	$zsig      = ((x($_REQUEST,'target_sig')) ? $_REQUEST['target_sig'] : '');
	$zkey      = ((x($_REQUEST,'key'))        ? $_REQUEST['key']        : '');

	if($ztarget) {
		if((! $zkey) || (! $zsig) || (! rsa_verify($ztarget,base64url_decode($zsig),$zkey))) {
			logger('zfinger: invalid target signature');
			$ret['message'] = t("invalid target signature");
			json_return_and_die($ret);
		}
	}

	// allow re-written domains so bob@foo.example.com can provide an address of bob@example.com
	// The top-level domain also needs to redirect .well-known/zot-info to the sub-domain with a 301 or 308

	// TODO: Make 308 work in include/network.php for zot_fetch_url and zot_post_url

	if(($zaddr) && ($s = get_config('system','zotinfo_domainrewrite'))) {
		$arr = explode('^',$s);
		if(count($arr) == 2) 
			$zaddr = str_replace($arr[0],$arr[1],$zaddr);
	}

	$r = null;

	if(strlen($zhash)) {
		$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash 
			where channel_hash = '%s' limit 1",
			dbesc($zhash)
		);
	}
	elseif(strlen($zguid) && strlen($zguid_sig)) {
		$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash 
			where channel_guid = '%s' and channel_guid_sig = '%s' limit 1",
			dbesc($zguid),
			dbesc($zguid_sig)
		);
	}
	elseif(strlen($zaddr)) {
		$r = q("select channel.*, xchan.* from channel left join xchan on channel_hash = xchan_hash
			where channel_address = '%s' limit 1",
			dbesc($zaddr)
		);
	}
	else {
		$ret['message'] = 'Invalid request';
		json_return_and_die($ret);
	}

	if(! $r) {
		$ret['message'] = 'Item not found.';
		json_return_and_die($ret);
	}

	$e = $r[0];

	$id = $e['channel_id'];

	$searchable = (($e['channel_pageflags'] & PAGE_HIDDEN) ? false : true);

	 

	//  This is for birthdays and keywords, but must check access permissions
	$p = q("select * from profile where uid = %d and is_default = 1",
		intval($e['channel_id'])
	);

	$profile = array();

	if($p) {
		$profile['description']   = $p[0]['pdesc'];
		$profile['birthday']      = $p[0]['dob'];
		if($profile['birthday'] != '0000-00-00')
			$profile['next_birthday'] = z_birthday($p[0]['dob'],$e['channel_timezone']);
		$profile['gender']        = $p[0]['gender'];
		$profile['marital']       = $p[0]['marital'];
		$profile['sexual']        = $p[0]['sexual'];
		$profile['locale']        = $p[0]['locality'];
		$profile['region']        = $p[0]['region'];
		$profile['postcode']      = $p[0]['postal_code'];
		$profile['country']       = $p[0]['country_name'];
		if($p[0]['keywords']) {
			$tags = array();
			$k = explode(' ',$p[0]['keywords']);
			if($k)
				foreach($k as $kk)
					if(trim($kk))
						$tags[] = trim($kk);
			if($tags)
				$profile['keywords'] = $tags;
		}
	}

	$ret['success'] = true;

	// Communication details

	$ret['guid']           = $e['xchan_guid'];
	$ret['guid_sig']       = $e['xchan_guid_sig'];
	$ret['key']            = $e['xchan_pubkey'];
	$ret['name']           = $e['xchan_name'];
	$ret['name_updated']   = $e['xchan_name_date'];
	$ret['address']        = $e['xchan_addr'];
	$ret['photo_mimetype'] = $e['xchan_photo_mimetype'];
	$ret['photo']          = $e['xchan_photo_l'];
	$ret['photo_updated']  = $e['xchan_photo_date'];
	$ret['url']            = $e['xchan_url'];
	$ret['connections_url']= (($e['xchan_connurl']) ? $e['xchan_connurl'] : z_root() . '/poco/' . $e['channel_address']);
	$ret['name_updated']   = $e['xchan_name_date'];
	$ret['target']         = $ztarget;
	$ret['target_sig']     = $zsig;
	$ret['searchable']     = $searchable;

	if(! $e['xchan_connurl'])
		
// FIXME encrypt permissions when targeted so that only the target can view them, requires sending the pubkey and also checking that the target_sig is signed with that pubkey and isn't a forgery. 


	$permissions = get_all_perms($e['channel_id'],(($ztarget && $zsig) 
			? base64url_encode(hash('whirlpool',$ztarget . $zsig,true)) 
			: '' ),false);

	$ret['permissions'] = (($ztarget) ? aes_encapsulate(json_encode($permissions),$zkey) : $permissions);


	if($permissions['view_profile'])
		$ret['profile']  = $profile;

	// array of (verified) hubs this channel uses

	$ret['locations'] = array();
	$x = zot_get_hubloc(array($e['channel_hash']));
	if($x && count($x)) {
		foreach($x as $hub) {
			if(! ($hub['hubloc_flags'] & HUBLOC_FLAGS_UNVERIFIED)) {
				$ret['locations'][] = array(
					'host'     => $hub['hubloc_host'],
					'address'  => $hub['hubloc_addr'],
					'primary'  => (($hub['hubloc_flags'] & HUBLOC_FLAGS_PRIMARY) ? true : false),
					'url'      => $hub['hubloc_url'],
					'url_sig'  => $hub['hubloc_url_sig'],
					'callback' => $hub['hubloc_callback'],
					'sitekey'  => $hub['hubloc_sitekey']
				);
			}
		}
	}

	$ret['site'] = array();
	$ret['site']['url'] = z_root();
	$dirmode = get_config('system','directory_mode');
	if(($dirmode === false) || ($dirmode == DIRECTORY_MODE_NORMAL))
		$ret['site']['directory_mode'] = 'normal';
	if($dirmode == DIRECTORY_MODE_PRIMARY)
		$ret['site']['directory_mode'] = 'primary';
	elseif($dirmode == DIRECTORY_MODE_SECONDARY)
		$ret['site']['directory_mode'] = 'secondary';
	elseif($dirmode == DIRECTORY_MODE_STANDALONE)
		$ret['site']['directory_mode'] = 'standalone';
	if($dirmode != DIRECTORY_MODE_NORMAL)
		$ret['site']['directory_url'] = z_root() . '/dir';
 
	json_return_and_die($ret);

}